LARGE CAPACITY HIKING BACKPACK: The SKYSPER 40L hiking backpack offers multiple compartments for easy storage and organization. It comes with a spacious zipper main compartment, 2 front zipper pockets, 1 front zipper sleeping bag pocket, 2 mesh pockets, 2 waist zipper pockets. The main compartment is additionally designed to help secure and carry a hydration bladder(not included). The 40l backpack can easily hold everything you need while hiking. WATER RESISTANT AND DURABLE MATERIAL: Our Hiking Backpack is made of high-density thickened 600D polyester and 210D nylon plaid fabric, which is water-resistant, impermeable, tear resistant and wear-resistant. All of the bag's stress points and shoulder straps are reinforced with lap-knots to ensure long lasting durability. ERGONOMIC AND COMFORTABLE DESIGN: The thickened padded back features an ergonomic breathable design, paired with breathable shoulder pads that help reduce fatigue during a full day hike. We’ve also added a sleeping bag compartment, a pocket near the bottom which can hold your shoes and sleeping bag. ADJUSTABLE AND REMOVABLE STRAP SYSTEM: The camping backpacks are designed to have convenient trekking pole fixtures. Open front-end plugins can be adapted to different hiking gear and multi-functional extensions.The 40L backpack also features detachable straps and an adjustable chest strap, allowing it to meet the requirements of a variety of situations. It comes with a safety whistle, making it the perfect hiking backpack for outdoor activities. UNIQUE SECURITY DESIGN: The hiking backpack features an anti-theft zipper to prevent important documents and items from being stolen while on the road. The mochila comes with a rain cover on the bottom and a fixing buckle, so you don't have to worry about the rain cover being blown off by heavy wind. The hiking backpack comes with an outdoor emergency safety guide, providing additional safety information for lovers of the outdoors.